Owner's Manual

Table Of Contents
146
Chapter 20: Using Accessories and Bluetooth
20.3
Using a Remote Speaker Microphone
A Remote Speaker Microphone (RSM) is an accessory made especially for handling PTT calls.
The RSM has a built-in loudspeaker and PTT button, which lets you remotely control your
phone’s PTT application. There are two types of RSMs: those that connect by wire to the phone’s
headset connector, and those that use Bluetooth.
20.3.1
Wired RSM
A wired RSM connects to the phone’s USB-C connector. The RSM has a loudspeaker and
microphone, along with a PTT button. The PTT button allows you to take the floor during a PTT
call and speak. The PTT button on the RSM works just like the PTT button on the phone. Depending
on the RSM, there may also be a connection for you to use a headset with the RSM. Check the
RSM owner’s manual for information specific to the accessory. With a wired RSM, you control the
loudspeaker volume using the volume keys on the phone and the volume buttons on the RSM.
NOTE: The PTT application must be in the foreground to take the floor using the wired
accessory.
20.3.2
Bluetooth
A Bluetooth-connected RSM gives you all the features of a wired RSM without being tethered by
a cord. In addition to having a loudspeaker and PTT button, a Bluetooth RSM also has a volume
control. You do not use the volume buttons on your phone to control the volume, but rather the volume
control on the RSM itself. A Bluetooth RSM must be “paired” to your phone before it can be used. For
instructions on how to pair the RSM with your phone, please refer to the documentation that comes
with the RSM.